He (kept) his (head); (otherwise) the accident (had happened).
A、
kept
B、
head
C、
otherwise
D、
had happened
【正确答案】
D
【答案解析】
otherwise表示否则，它所在的句子要用虚拟语气。本句是对过去发生事情的假设，用would have done表示。改“had happened"为“would have happened”
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